dsig:SignatureValue missing from SAML2.0 XML

Hello everyone,

I try to get the the following Tags to my SAML 2.0 XML:

<ds:Signature>
<ds:SignedInfo>
</ds:SignedInfo>
<ds:SignatureValue>
xy6z
</ds:SignatureValue>

Unfortunately I could not find in the documentation which configuration enables this, because currently the Signature related tags are missing from my xml.

Thanks in Advance!
SJ